Preparation And Properties Of Molybdenum Disulfide And Its Composites

Molybdenum disulfide（MoS₂）and its composite are widely used in adsorption,electrocatalytic hydrogen evolution,transistors,ion batteries and supercapacitors due to their special properties.In this paper,porous composite of carbon and molybdenum disulfide（C/MoS₂）and silver loaded molybdenum disulfide nanotubes（MoS₂NTs-Ag）were synthesized by some novel preparation methods,and their formation process,structural feature,adsorption,antibacterial and electrocatalytic properties were studied.In addition,polyols were used as the solvent,and few-layer MoS₂nanosheets were prepared by liquid-phase ultrasonic exfoliation.The specific contents are summarized as follows:1. The porous composite C/MoS₂with high specific surface area was prepared bysimple hydrothermal method using ammonium molybdate as molybdenum source,sublimated sulfur as sulfur source,glycol as reducing agent and carbon source,and a small amount of deionized water as solvent at 190℃.Then,the product was characterized,and its adsorption for methyl orange（MO）and photocatalytic antibacterial properties for S.aureus and E.coli were studied.The results showed that the high adsorption capacity（450 mg/g）for MO and good bactericidal performance of the porous composite C/MoS₂.2. MoS₂nanotubes（NTs）were prepared by using carbon nanotubes as template andammonium tetrathiomolybdate as precursor,then MoS₂NTs-Ag was prepared by silver ion impregnation method,and their electrocatalytic hydrogen evolution performance was studied.It was found that MoS₂NTs-Ag has more active sites than MoS₂nanotubes,and it is more conducive to electrocatalysis.3. In the mixed solution of glycerin and ethanol,few-layer MoS₂nanosheets withdifferent thicknesses were successfully obtained using liquid-phase ultrasonic exfoliation method by controlling different ultrasound time.